edk2: Remove AppPkg, StdLib, StdLibPrivateInternalFiles

[mirror_edk2.git] / StdLib / LibC / Math / s_scalbn.c

diff --git a/StdLib/LibC/Math/s_scalbn.c b/StdLib/LibC/Math/s_scalbn.c
deleted file mode 100644 (file)
index 072f1c7..0000000
--- a/StdLib/LibC/Math/s_scalbn.c
+++ /dev/null
@@ -1,60 +0,0 @@
-/* @(#)s_scalbn.c 5.1 93/09/24 */\r
-/*\r
- * ====================================================\r
- * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.\r
- *\r
- * Developed at SunPro, a Sun Microsystems, Inc. business.\r
- * Permission to use, copy, modify, and distribute this\r
- * software is freely granted, provided that this notice\r
- * is preserved.\r
- * ====================================================\r
- */\r
-#include  <LibConfig.h>\r
-#include  <sys/EfiCdefs.h>\r
-#if defined(LIBM_SCCS) && !defined(lint)\r
-__RCSID("$NetBSD: s_scalbn.c,v 1.12 2002/05/26 22:01:58 wiz Exp $");\r
-#endif\r
-\r
-/*\r
- * scalbn (double x, int n)\r
- * scalbn(x,n) returns x* 2**n  computed by  exponent\r
- * manipulation rather than by actually performing an\r
- * exponentiation or a multiplication.\r
- */\r
-\r
-#include "math.h"\r
-#include "math_private.h"\r
-\r
-static const double\r
-two54   =  1.80143985094819840000e+16, /* 0x43500000, 0x00000000 */\r
-twom54  =  5.55111512312578270212e-17, /* 0x3C900000, 0x00000000 */\r
-huge   = 1.0e+300,\r
-tiny   = 1.0e-300;\r
-\r
-double\r
-scalbn(double x, int n)\r
-{\r
-  int32_t k,hx,lx;\r
-  EXTRACT_WORDS(hx,lx,x);\r
-        k = (hx&0x7ff00000)>>20;    /* extract exponent */\r
-        if (k==0) {       /* 0 or subnormal x */\r
-            if ((lx|(hx&0x7fffffff))==0) return x; /* +-0 */\r
-      x *= two54;\r
-      GET_HIGH_WORD(hx,x);\r
-      k = ((hx&0x7ff00000)>>20) - 54;\r
-            if (n< -50000) return tiny*x;   /*underflow*/\r
-      }\r
-        if (k==0x7ff) return x+x;   /* NaN or Inf */\r
-        k = k+n;\r
-        if (k >  0x7fe) return huge*copysign(huge,x); /* overflow  */\r
-        if (k > 0)        /* normal result */\r
-      {SET_HIGH_WORD(x,(hx&0x800fffff)|(k<<20)); return x;}\r
-        if (k <= -54) {\r
-            if (n > 50000)  /* in case integer overflow in n+k */\r
-    return huge*copysign(huge,x); /*overflow*/\r
-      else return tiny*copysign(tiny,x);  /*underflow*/\r
-  }\r
-        k += 54;        /* subnormal result */\r
-  SET_HIGH_WORD(x,(hx&0x800fffff)|(k<<20));\r
-        return x*twom54;\r
-}\r